Branch Circuits & WiringQuestion 145 of 521
Under Table 300.5, what is the minimum burial depth for a direct-buried rigid metal conduit (RMC) installed under a residential driveway of a one-family dwelling?
a.12 in
b.18 in
c.24 in
d.6 in
Explanation
Table 300.5 requires 18 in minimum cover for RMC and IMC located under one- and two-family dwelling driveways. General non-driveway locations allow 6 in for RMC, but the driveway column increases this. 12 in and 6 in are too shallow here; 24 in is required for direct-buried cable, not RMC under a driveway.
Law Reference: 2023 NEC §300.5Practice all 521 questions free — no signup required.
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